1
+10
5
+10
10
+3
7
+1
7
+1
3
+1
1
+2
3
+11
3
+12
6
+2
1
+15
8
+11
6
+11
7
+11
10
+3
8
+11
3
+11
1
+11
7
+2
6
+13
Practice addition within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Addition Within 20 Hard Worksheets worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.